Elliot Linzer
Linear Algebra and Its Applications
A new algorithm for computing Hadamard transforms is presented. If n is a power of four, then the new algorithm uses ⅞ n logn multiply/adds to compute a Hadamard transform of length n. © 1994 IEEE
Elliot Linzer
Linear Algebra and Its Applications
Don Coppersmith, Moshe Lewenstein
SIAM Journal on Discrete Mathematics
Don Coppersmith, Nick Howgrave-Graham, et al.
Journal of Discrete Algorithms
Ephraim Feig, Michael Ben-Or
Linear Algebra and Its Applications